影响：influence= impact
污染：pollution = contamination
人类：human beings= mankind = humane race
青少年：young people = youngsters = youths = adolescents
优点：advantage = merits = superiority = virtue
责任： responsibility = obligation = duty = liability
职业： job = career = employment = profession
娱乐： enjoyment = pastimes = recreation= entertainment
努力：struggle for = aspire after = strive for = spare no efforts for
从事： embark on = take up = set about = go in for
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